200829668 九、發明說明 【發明所屬之技術領域】 本發明有關黏著劑組成物，詳言之，有關用爲偏光板 (polarizer )等的光學構件的表面保護薄片之黏著劑層， 而帶電防止性優異之同時，能減少因被黏附體表面的形狀 及極性（polarity )或剝離速度所引起之黏著力（adhesive strength )的差之黏著劑組成物。 【先前技術】 在來，作爲電子設備等所貼附之黏著薄片，將基材、 剝離紙等施加帶電防止處理，或作爲黏著劑的底塗層（ undercoat layer )而使用經層合帶電防止層之帶電防止黏 著薄片。 近年來，對黏著劑層本身賦予帶電防止功能之需求增 高，誘致對黏著劑層添加有帶電防止劑之帶電防止黏著劑 之開發。例如，有一種含有離子性液體及具有（甲基）丙 烯酸伸烷氧化物之（甲基）丙烯酸系聚合物之黏著劑組成 物之報告（參考專利文獻1 )。 然而，將經利用上述黏著劑組成物之黏著薄片，例如 ，貼附於低極性且表面有凹凸之防閃光（AG，antiglare) 偏光板（polarizer )的情形，與貼附於高極性且表面爲平 滑的平面（plane )偏光板的情形，由於因其表面形狀及極 性之不相同而會產生黏著力之差異之故，需要分開使用經 配合偏光板種類所設計之黏著薄片。此種作爲，即表示在 -5- 200829668 並行操作利用AG偏光板之電子設備與利用平面偏光板之 電子設備之作業流程中，需要利用兩者均適合之黏著薄片 之意，因而在成本或作業效率方向存有問題。 另一方面，已達成保護表面之功能之黏著薄片終會被 剝離而廢棄，惟如以高速實施該剝離作業時，則因黏著力 的關係而剝離時所需力量會增大之故，存在有產生作業效 率的低落、污染等問題，如爲改善此等問題而抑低黏著力 時則有構件的密合性不佳以致存在有黏著薄片之浮起（ relief)或脫皮（peeling)之問題。 爲解決此種問題，有一種藉由含有羥基及羧基並具有 特定範圍之玻璃化溫度之丙烯酸系共聚物與芳香族多官能 異氰酸酯化合物之使用，而減少剝離力之速度依賴性之敏 壓接著劑（pressare sensitive adhesive)組成物之報告（ 參考專利文獻2 )。 然而，上述黏著劑組成物並不具有帶電防止功能，並 且未能減少因被黏附體表面形狀及極性不相同所產生之黏 著力之差。 專利文獻1 :日本專利特開2004-263 084號公報 專利文獻2 :日本專利特開200 1 - 1 23 1 3 6號公報 【發明內容】 〔發明所欲解決之課題〕 因而，需要開發一種帶電防止性優異之同時，能減少 因被黏附體表面狀態之不相同所產生之內聚力之差，並且 -6- 200829668 在高速剝離及低速剝離時之黏著力之差亦小的黏著劑組成 物，因此，本發明之課題在於提供此種黏著劑組成物。 〔用以解決課題之手段〕 本發明人，爲解決上述課題起見專心硏究之結果發現 ，對使具有嫌化氧構造（alkylene oxide structure)之（ 甲基）丙烯酸系單體，具有特定的官能基之2種單體以及 (甲基）丙烯酸烷基酯共聚合所得之（甲基）丙烯酸系聚 合物，調配由有機陽離子與無機陰離子所成液體離子鹽及 異氰酸酯交聯劑後所得之黏著劑組成物，係帶電防止效果 優異之同時，不受剝離速度而可減小因被黏附體表面形狀 及極性不相同所引起之黏著力之差，並且亦能減少因剝離 速度所引起之黏著力之差之事實，終於完成本發明。 亦即，本發明係一種黏著劑組成物，其特徵爲：含有 下述成分（A)至（C)。 (A)由下述成分（al)至（a4)之共聚合所得之（ 甲基）丙烯酸系聚合物（但，（al)至（a4)的合計爲 1 0 0 質量。/。） (a 1)具有烯化氧構造之（甲基）丙烯酸系單體 10至70質量％ (a2)含羥基之單體 1至8質量％ U3)含有羧基、醯胺基、或胺基之任一官能基之單體 0.05〜0.5質量％ 2 5至8 5質量％ (a4)(甲基）丙烯酸烷基酯 200829668 (B) 由有機陽離子及無機陰離子所成之液體離子鹽 (C) 異氰酸酯交聯劑 再者，本發明係一種黏著薄片，其特徵爲：進行上述 黏著劑組成物之交聯所製得者。 〔發明之效果〕 本發明之黏著劑組成物，係由於具有優異的帶電防止 效果之同時，能減少因被黏附體表面的形狀及極性或剝離 速度所引起之黏著力之差之故，可適用之被黏附體的範圍 廣泛，機械特性優異並能提升作業效率者。 〔發明之最佳實施形態〕 本發明之黏著劑組成物，係作爲構成成分而含有將後 述成分（al)至（a4)進行共聚合所得之（甲基）丙烯酸 系聚合物（成分（A))、由有機陽離子及無機陰離子所 成之液體離子鹽（成分（B ))以及異氰酸酯交聯劑（成 分（C))者。 構成上述（甲基）丙烯酸系聚合物之成分，係具有嫌 化氧構造之（甲基）丙烯酸系單體（成分（al))、含經 基之單體（成分（a2))、含有羧基、醯胺基或胺基的任 一官能基之單體（成分（a3))以及（甲基）丙烯酸院基 酯（成分（a4))。 構成成分（A )之成分（a 1 )，係分子中具有烯化氧 構造者，烯化氧構造而言，可例舉：羥亞甲基、羥伸乙基 -8 - 200829668 、羥伸丙基、羥伸丁基等，又對（甲基）丙烯酸之烯化氧 構造的加成莫耳數並不限定，惟較佳爲1至3。 具有上述燃化氧構造之（甲基）丙烯酸系單體的具體 例而言，可舉：甲氧二乙二醇（甲基）丙烯酸酯、甲氧三 乙二醇（甲基）丙烯酸酯等的甲氧聚乙二醇（甲基）丙烯 酸酯；乙氧二乙二醇（甲基）丙燦酸酯、乙氧三乙二醇（ 甲基）丙烯酸酯等的乙氧聚乙二醇（甲基）丙烯酸酯；丁 氧乙二醇（甲基）丙烯酸酯、丁氧三乙二醇（甲基）丙烯 酸酯等的丁氧聚乙二醇（甲基）丙烯酸酯；苯氧二乙二醇 (甲基）丙烯酸酯、苯氧三乙二醇（甲基）丙烯酸酯等的 苯氧聚乙二醇（甲基）丙烯酸酯；曱氧丙二醇（甲基）丙 烯酸酯等的甲氧聚丙二醇（甲基）丙烯酸酯等。其中，乙 氧二乙二醇丙烯酸酯、甲氧乙基丙烯酸酯等很好用。 具有上述成分（al)之烯化氧構造之（甲基）丙烯酸 系單體，可以單獨使用，亦可混合2種以上使用，惟對全 體之含量係成分（A)的（甲基）丙烯酸系聚合物的單體 成分中10至70質量％，較佳爲20至60質量％。如該含 量較10質量％爲少時或較70質量％爲多時，則可能因被 黏附體的表面形狀及極性所引起之黏著力的差增大，或剝 離時會發生對被黏附體的污染。 又，構成成分（A)之成分（a2)的含羥基之單體而 言，可例舉·· 2-羥乙基（甲基）丙烯酸酯、2-羥丙基（甲 基）丙烯酸酯、6-羥己基（甲基）丙烯酸酯、4-羥丁基（ 甲基）丙烯酸酯、聚丙二醇-(甲基）丙烯酸酯、1，6-己二 -9 - 200829668 醇-(甲基）丙烯酸酯等般的烷二醇的-(甲基）丙烯酸酯 類；N-羥乙基（甲基）丙烯醯胺、N-羥丙基（甲基）丙烯 醯胺等般的（甲基）丙烯醯胺類，其中4-羥丁基（甲基） 丙烯酸酯、2-羥乙基（甲基）丙烯酸酯等很好用。 上述成分（a2)之含羥基之單體，可以單獨使用亦可 混合2種以上使用，惟對全體之含量在成分（A )的（甲 基）丙烯酸系聚合物的單體成分中較佳爲1至8質量％， 更佳爲3至6質量％。 再者，含有構成成分（A)之成分（a3)的羧基、醯 胺基、或胺基的任一官能基之單體，係含有羥基之單體而 言，可例舉：（甲基）丙烯酸、（甲基）丙烯酸石羧乙酯 、衣康酸、巴豆酸、馬來酸、富馬酸等，又含醯胺基之單 體而言，可例舉：丙烯醯胺、N，N -二甲基丙烯醯胺、N-( 1，1-一甲基-3-氧丁基）丙烯_胺、第三丁基丙嫌醢胺磺酸 等，再者，含胺基之單體而言，可例舉：N，N-二甲胺乙基 (甲基）丙烯酸酯、N，N -二乙胺乙基（甲基）丙烯酸酯、 N，N -二甲胺丙基（甲基）丙烯酸酯、N，N -二乙胺丙基（甲 基）丙烯酸酯等。此中，丙烯酸、丙烯醯胺、二甲胺乙基 甲基丙烯酸酯很好用。又，該成分（a3)中，可包含如^ (N’，N’-二甲胺甲基）丙烯醯胺等具有羧基，醯胺基或胺 基2個以上之單體。 含有上述成分（a3)的羧基、醯胺基、或胺基之任一 官能基之單體，可以單獨使用，亦可混合2種以上使用， 惟對全體之含量在成分（A)的（甲基）丙烯酸系聚合物 -10- 200829668 的單體成分中較佳爲0.05至0.5質量％，更佳爲〇·1至 0.3質量％。如在此範圍，則可減少因剝離速度所引起之 黏著力之差，如（a3 )聚合物在0.05質量％以下時，則難 於減少剝離力之速度依賴性而如在0.5質量％以上時，則 會發生高速剝離時輪流反覆停止與瞬間剝離之現象（ zipping )。又，（a3)單體亦具有將（甲基）丙烯酸系聚 合物的極性進行微調整之作用效果。 再者，構成成分（A)之成分（a4)的（甲基）丙烯 酸烷基酯而言，可具體例舉：（甲基）丙烯酸甲酯、（甲 基）丙烯酸乙酯、（甲基）丙烯酸正丙酯、（甲基）丙烯 酸異丙酯、（甲基）丙烯酸正丁酯、（甲基）丙烯酸異丁 酯、（甲基）丙烯酸正戊酯、（甲基）丙烯酸異戊酯、（ 甲基）丙烯酸正己酯、（甲基）丙烯酸2-乙基己酯、（甲 基）丙烯酸正辛酯等，此中，較佳爲（甲基）丙烯酸2-乙 基己酯。 上述成分（a4)的（甲基）丙烯酸烷基酯，可以單獨 使用亦可混合2種以上使用，惟對全體之含量在（甲基） 丙烯酸系聚合物的單體成分中較佳爲25至85質量％，更 佳爲3 5至7 5質量％。 本發明所用之成分（A)的（甲基）丙烯酸系聚合物 ，係將上述成分（a 1 )至（a4 )的單體，依例如，溶液聚 合’乳化聚合、塊狀聚合等通常用於（甲基）丙烯酸系聚 合物的合成之方法使其共聚合，即可製得者。該成分（A )的（甲基）丙烯酸系聚合物之分子量並不特別限制，惟 -11 - 200829668 較佳爲20萬至70萬。 又，本發明所用之成分（A)的（甲基）丙烯酸系聚 合物之製造時，除上述成分之外’需要時尙可使用聚合起 始劑、聚合調整劑。 上述聚合起始劑而言’可例舉；偶氣一異丁腈等的偶 氮系聚合起始劑、過氧化苯甲醯等的過氧化物的過氧化物 系聚合起始劑，可對上述成分（al )至（a4 )的單體的混 合物1 0 0重量份，按0.0 1至1重量份的範圍使用。 另一方面，本發明之成分（B)，係由有機陽離子與 無機陰離子的組合所成之液體離子鹽。在此’本說明書中 液體離子鹽表示在室溫（25t )下爲液體之鹽之意。 構成上述成分（B)之有機陽離子而言，可例舉：咪 口坐鑰（imidazolium)陽離子、卩比卩定鑰（pyridinium)陽離 子、哌啶鑰（piperidinium)陽離子、吡咯烷鑰（ pyrrolidinium)陽離子、四氫吡咯烷鑰陽離子、二氫嘧啶 鑰陽離子、四烷基銨陽離子、三烷基锍陽離子等。此中’ 較佳爲咪唑鑰陽離子、吡啶鑰陽離子，特佳爲吡啶鎩陽離 子。 上述咪唑鑰陽離子之具體例而言，可例舉：1，3-二甲 基咪唑鑰陽離子、1，3-二乙基咪唑鑰陽離子、1-乙基-3-甲 基咪唑鑰陽離子、1 - 丁基-3 -甲基咪唑鐵陽離子、1 -己基_ 3-甲基咪唑鏺陽離子、1-辛基-3-甲基咪唑鑰陽離子、1-癸 基-3-甲基咪唑鑰陽離子、1-十二烷基-3-甲基咪唑鑰陽離 子、1-十四烷基-3-甲基咪唑鑰陽離子、1，2-二甲基-3-丙基 -12- 200829668 味哗錄陽離子、I -乙基-2,3 - _^甲基味哩鐵陽離子、1 - 丁某-2,3 -二甲基咪唑鑰陽離子、1·己基-2,3 -二甲基咪唑鑰陽離 子等’此中’較佳爲1-丁基-3-甲基味哇鐵陽離子、1-己 基-3-甲基咪唑鑰陽離子。 又，上述吡啶鑰陽離子之具體例而言，可例舉：1 -乙 基吡啶鑰陽離子、1-丁基吡啶鑰陽離子、1-己基吡啶鑰陽 離子、1-丁基-3-甲基吡啶鑰陽離子、1 丁基-4-甲基吡啶鍚 陽離子、1-己基-3-甲基吡啶鐵陽離子、1-己基-4-甲基吡 啶鑰陽離子、卜丁基-3，4-二甲基吡啶鎗陽離子等，此中， 1-己基-4-甲基吡啶鐵陽離子很好用。 又，構成上述成分（B)之無機陰離子而言，可例示 :Cf、Br_、Γ、A1C14·、AI2CI7-、BF4.、PF6.、C104_、 N O 3 、A s F 6 、S b F 6 Λ N b F 6 、T aF 6 、F (HF) n 等，此中 pf6_、BF4_等很好用。 本發明之成分（B)，係從上述有機陽離子及無機陰 離子適當選擇之組合所成之鹽，具體上，可例舉：ι-乙基-3 -甲基咪唑鑰四氟硼酸酯、卜乙基-3-甲基咪唑鑰六氟磷酸 酯、1-丁基-3-甲基毗啶鑰四氟硼酸酯、1·丁基-3-甲基吡 啶鎗六氟磷酸酯、1 -己基-3 -甲基咪唑鍚四氟硼酸酯、1 -己 基-3 -甲基咪唑鑰六氟磷酸酯、卜辛基-3 -甲基咪唑鐵四氟 硼酸酯、1-辛基-3-甲基咪唑鑰六氟磷酸酯、1_己基-3-甲 基咪唯鑰溴化物、1 -己基-3 -甲基咪唑鑰氯化物、1 -己基· 2,3-二甲基咪唑鑰四氟硼酸酯、1-己基_2，3_二甲基咪唑鑰 六氟磷酸酯；1 -丁基吡啶鐵四氟硼酸酯、1 ·丁基吡啶鐵六 -13- 200829668 氟磷酸酯、1 -己基吡啶鑰四氟硼酸酯、1 -己基吡啶鑰六氟 磷酸酯、1-丁基-3-甲基吡啶鑰四氟硼酸酯、1-丁基-3-甲 基吡啶鑰六氟磷酸酯、卜己基甲基吡啶鐵四氟硼酸酯、 1_己基-4-甲基吡啶鑰六氟磷酸酯等，此中，1-丁基-3-甲 基咪唑鑰六氟磷酸酯、卜己基-3-甲基咪唑鑰四氟硼酸酯、 1-己基-4-甲基吡啶鐵六氟磷酸酯等很好用。 該成分（Β )的調配量’係對前述成分（A ) 1 0 0重量 份，通常爲〇.〇5至3重量份之範圍，較佳爲〇·3至1·5重 量份之範圍。 再者，本發明之成分（C )之異氰酸酯交聯劑，係分 子中具有能與羥基進行交聯之異氰酸酯基之化合物，具體 而言，可例示··甲伸苯基二異氰酸酯、氯伸苯基二異氰酸 酯、六亞甲基二異氰酸酯、四亞甲基二異氰酸酯、異佛爾 酮（isophorone )二異氰酸酯、二甲苯二異氰酸酯，經加 氫之二甲苯二異氰酸酯等的異氰酸酯單體，或使此等對三 羥甲基丙烷等的2元以上的醇化合物等上進行加成反應之 異氰酸酯化合物以及異三聚異氰酸酯化合物。又，亦可例 舉：對周知之聚醚型多元醇或聚酯型多元醇、丙烯酸多元 醇、聚丁烯多元醇、聚戊二烯多元醇等上使異氰酸酯化合 物進行加成反應之聚胺酯預聚合物（prepolymer)等。此 中，六亞甲基二異氰酸酯很好用。 該成分（C)的調配量，係對成分（a) 100重量份， 通常爲0.5至10重量份之範圍，較佳爲2至5重量份之 範圍。 -14- 200829668 本發明之黏著劑組成物，係對上述成分（A )至（C ) 中，需要時添加其他添加劑，並依常法進行混合即可製得 。又此時，爲使上述成分溶解或分散而亦可含有有機溶劑 等的溶劑，惟較佳爲不用溶劑之下直接加以混合。 本發明之帶電防止黏著劑組成物中，除前述各成分之 外，在不影響本發明之效果之範圍內，需要時尙可調配黏 著賦予劑、可塑劑、氧化防止劑、防腐劑等。 將如上述方式所得之本發明之黏著劑組成物，依常法 塗佈於支撐體表面並使其乾燥，即可製得本發明之黏著薄 片。 黏著薄片之製造中，上述支撐體而言，例如，可使用 聚酯、聚乙烯等的樹脂薄片，又，黏著劑組成物的塗佈厚 度，通常爲2至30//m，較佳爲10至20//m。 如上述方式所得之本發明之黏著薄片，不管剝離速度 如何，經貼附於AG偏光板或平面偏光板等表面形狀及極 不相同之被黏附體時的黏著力的差均小，又’在低速剝離 時之黏著力與在高速剝離時之黏著力的差亦小者° 【實施方式】 〔實施例〕 接著，藉由製造例及實施例而將更詳細說明本發明內 容，惟本發明並不因此等實施例等而有所限定。 〔製造例1〕 -15- 200829668 反應容器中置入作爲成分（al)之乙氧二乙二醇 酸酯（ECA，共榮社製）60重量份、作爲成分（a2 ) 羥丁基丙烯酸酯（4HBA) 5重量份、作爲成分（a3 ) 烯酸〇·15重量份、作爲成分（a4)之2_乙基己基丙 酯（2EHA) 34.85重量份、醋酸乙酯12〇重量份以及 二異丁腈（AIBN ) 0· 1重量份，並以氮氣取代該反應 內的空氣。然後，在氮氣雰圍中攪拌之下，使該反應 升溫爲70 C並反應6小時。反應完成後使用醋酸乙酯 稀釋，製得分子量5 0萬的丙烯酸系聚合物溶液a i。 〔製造例2至3〕 除將成分（a 1 )至（a4 )改變爲如下述表2以外 餘則按與製造例1同樣方式製得丙烯酸系聚合物溶济 及A 3。將其分子量亦倂記於表1中。 〔製造比較例1至1 5〕 除將成分（a 1 )至（a4 )改變爲如下述表2以外 餘則按與製造例1同樣方式製得丙烯酸系聚合物溶許 及B 1 5。將其分子®亦倂記於表1中。 丙烯 之4 _ 之丙 烯酸 偶氮 容器 容器 加以 ，其 A2 ，其 B 1 -16- 200829668 〔表1〕 al a2 a3 a4 下曰 yj J里 MEA ECA 4HBA 2HEA AA AM DM 2EHA 製造例1 A1 一 60 5 • 0.15 • • 34.85 50萬 製造例2 A2 10 10 3 • 0.3 - 0.1 76.6 40萬 製造例3 A3 10 10 一 8 • 0.4 麵 71.6 40萬 製造比較例1 B1 • 5 5 麵 0.15 - 晒 89.85 40萬 製造比較例2 B2 10 25 5 - 0.15 華 59.85 40萬 製造比較例3 B3 15 70 5 一 0.15 擊 一 9.85 50萬 製造比較例4 B4 一 5 5 0.15 一 89.85 40萬 製造比較例5 B5 15 70 5 • 0.15 讀 9.85 50萬 製造比較例6 B6 5 5 • 0.15 一 89.85 40萬 製造比較例7 B7 10 25 5 • 0.15 • 一 59.85 40萬 製造比較例8 B8 15 70 5 0.15 9.85 50萬 製造比較例9 B9 - 5 5 - 0.15 89.85 40萬 製造比較例10 B10 10 25 5 - 0.15 蠢 59.85 40萬 製造比較例11 B11 15 70 5 0.15 9.85 50萬 製造比較例12 B12 10 25 5 一 60 40萬 製造比較例13 B13 15 35 5 1 擊 • 44 45萬 製造比較例14 B14 50 师 • • 0.15 一 49.85 45萬 製造比較例15 B15 - 26 - 4 - - 70 45萬 在此，表中之簡寫表示如下意義。 MEA :甲氧乙基丙烯酸酯 EC A :乙氧二乙二醇丙烯酸酯 4HBA : 4-羥丁基丙烯酸酯 2HEA : 2-羥乙基丙烯酸酯 AA :丙烯酸 A Μ :丙烯醯胺 DM:二甲胺乙基甲基丙烯酸酯 2EHA : 2-乙基己基丙烯酸酯 -17- 200829668 〔實施例1〕 對製造例1所製得之丙烯酸系聚合物溶液A丨的固體 成分100重量份，添加作爲液體離子鹽之^己基-4_甲基 吡D定鑰六氟磷酸酯1重量份，及作爲異氰酸酯交聯劑之六 亞甲基二異氰酸酯（HMDI ) 3重量份，將此混合後，製得 黏著劑組成物。 將此黏著劑組成物，按乾燥後的厚度能成爲20 # m之 方式塗工於聚酯薄膜上，在80 °C下乾燥2分鐘後，於黏著 劑層側貼合經剝離處理之聚醋薄膜（P E T 3 8 1 1，琳科·技彳 1^1^1〇社製），在231：、濕度65%的條件下進行熟成7 曰，製得黏著薄片。 〔實施例2至3〕 除將丙烯酸系聚合物溶液及液體離子鹽改變爲如下述 表2之方式外，其餘則按與實施例1同樣方式製得黏著劑 組成物及黏著薄片。在此，表2中記載液體離子鹽的陽離 子及陰離子究屬於有機或無機之情形。 〔比較例1至1 5〕 除將丙烯酸聚合物溶液及離子性液體改變爲下述表2 之方式外，其餘則按與實施例1同樣方式製得黏著劑組成 物及黏著薄片。在此，倂記離子鹽的陽離子及陰離子究屬 於有機或無機、以及離子鹽在室溫下之狀態。 -18- 200829668 〔表2〕 系聚合物 離子鹽 陽離子 陰離子 狀態 實施例1 ---Α1 1-己基-4·甲基吡啶鑰六氟磷酸酯 有機 無機 液體 實施例2 1-丁基-3·甲基咪唑鑰六氟碟酸酯 有機 無機 液體 實施例3 1-己基-3-甲基咪唑鑰四氟硼酸酯 有機 無機 液體 比較例1 __B1 - _ 比較例2 -___B2 一 奪 咖 比較例3 __B3 一 一 • 比較例4 __B4 1·己基-4-甲基吡啶鑰六氟碟酸酯 有機 無機 液體 比較例5 __B5 1-丁基-3-甲基咪唑鑰六氟磷酸酯 有機 無機 液體 比較例ό __B6 三甲基丙基錢雙(三氟甲磺_)醯亞胺 有機 有機 液體 比較例7 B7 三甲基丙基銨雙(三氟甲磺_酶亞胺 有機 有機 液體 比較例8 ^_B8 1-己基-3·甲基咪哩鐵六氟甲磺酸酯 有機 有機 液體 比較例9 B9 過氯酸鋰 ^fnr士嫩 無機 無機 固體 比較例10 BIO 過氯酸鋰 無機 無機 固體 比較例11 Bll 過氯酸鋰 無機 無機 固體 比較例12 B12 1-己基-4-甲基吡啶鑰六氟磷酸酯 有機 無機 液體 比較例13 B13 1-丁基-3-甲基咪唑鑰六氟磷酸酯 有機 無機 液體 比較例14 B14 1-丁基-3-甲基咪啶鐵六氟碟酸酯 有機 無機 液體 比較例15 B15 1-己基-3-甲基咪唑六氟甲磺酸酯 有機 有機 液體 就實施例1至3及比較例1至1 5所得之黏著薄片， 依照下述評價方法及基準，對剝離力、帶電防止性加以評 價。將結果表示於表3中。 (評價方法及基準） <剝離力> 將黏著薄片裁切爲150mmx250mm的大小後，將經剝 離處理之聚酯薄膜加以剝離，分別轉錄（transcribe )至 AG偏光板、plane (平面）偏光板的單面。依23 °C、濕度 -19- 200829668 65%之條件放置1日後，測定將所貼附之黏著薄片依撕拉 速度3 00mm/分鐘（低速）、30m/分鐘（高速）往180°方 向剝離時的黏著力，並分別作爲低速剝離力、高速剝離力 <帶電防止性> (評價方法） 製作經將丙烯酸板（70mm xl50mmxlmm)與偏光板 (AG偏光板、平面偏光板）按偏光板的AG面、平面面 能成爲外側之方式貼合之層合體，使用除靜電器（ KEYENCE社製，SJ-F3 00 )力口以除靜電。 將上述實施例、比較例所製得之黏著薄片裁切爲 40mmxl50mm 後，使用 2kg 橡皮車昆(rubber roller)壓貼 於經預先除靜電之層合物的AG面、平面面上。依25 t， 濕度65%條件放置1日後，再度進行除靜電，並使用電位 測定器（KEYENCE社製，SK )測定依撕拉速度30m/分鐘 ，剝離角度180°方向剝離時的偏光板表面電位。 (評價基準） 評價 剝離帶電壓 〇： ±0.5kV以下 ±0.5 〜1 .OkV X ·· ±1 .OkV以上 -20· 200829668 〔表3〕 高速剝離力(3 〇m/min) 單位:g / 1 5 0 m m 高速剝離力(3〇m/min) 單位:g /1 5 0 m m 帶電 防止性 AG① 平面② ①-② AG③ 平面④ ③，④ 實施例1 42 42 0 650 650 0 〇 實施例2 42 42 0 650 650 0 〇 實施例3 43 43 0 650 650 0 〇 比較例1 42 36 6 650 600 50 X 比較例2 36 43 7 600 650 50 X 比較例3 32 48 16 550 750 200 X 比較例4 污染 污染 未判定 比較例5 36 47 11 600 750 150 〇 比較例6 41 36 7 650 600 50 〇 比較例7 36 42 6 600 650 50 〇 比較例8 32 48 16 550 750 200 〇 比較例9 污染 污染 未判定 比較例10 污染 污染 未判定 比較例11 33 47 14 550 750 200 Δ 比較例12 54 48 6 900 750 50 〇 比較例13 53 52 1 SOOzip^1 500zip^ 0 X 比較例14 不能測定X2 不能測定^ 未判定 比較例15 53 47 6 900 750 150 〇 ※1 :因黏著劑層之變形不能跟隨剝離速度，以致出 現停止與瞬間剝離輪流反覆之現象。 ※2 :剝離時，在黏著劑層發生破損，以致未能精確 測定。 由此結果可知，使用本發明之黏著劑組成物所製造之 黏著膠帶（tape )，係帶電防止性優異之同時，在高速剝 離及低速剝離之任一情形，均對AG偏光板及平面偏光板 -21 - 200829668 顯示同等的黏著力，再者，在高速剝離時之黏著力與低速 剝離時之黏著力的差亦爲小者。 相對於此，在丙烯酸系聚合物的單體組成或離子鹽不 相同於本發明者之比較例中，貞[]AG偏光板與平面偏光板 之間之黏著力的差爲大，或發生對被黏附體的污染以致不 能製得充分的性能者。例如，在與前述專利文獻1 (曰本 專利特開2006-63 3 1 1號公報）的實施例1所用之丙烯酸 系聚合物同樣的單體組成所得之丙烯酸系聚合物，與使用 同樣有機陽離子及有機陰離子所成液體離子鹽之比較例1 5 ’在低速剝離、高速剝離均在對AG偏光板與平面偏光板 之黏著力之差爲大，又，在低速剝離時之黏著力與高速剝 離時之黏著力之差亦較實施例1至3爲大者。 〔作用〕 爲何本發明之黏著薄片在AG偏光板或平面偏光板均 能顯示同等黏著力之理由尙未明瞭，惟可推測爲如下。亦 即，AG偏光板係低極性者而表面存在凹凸，相對地，平 面偏光板係高極性者而平滑。具有烯化氧構造之（甲基） 丙烯酸系單體或其他含羥基之單體等的含官能基單體的含 量愈多，成分（A)的（甲基）丙烯酸系聚合物愈成爲高 極性者，而如（甲基）丙烯酸系聚合物之極性愈高，則對 低極性之AG偏光板之黏著力愈降低，對高極性的平面偏 光板之黏著力則愈增大。 另一方面，由於AG偏光板表面的凹凸的間隙小之故 -22- 200829668 ’通常黏著劑並非全面黏附，對凹部則並未接觸。因而， 對（甲基）丙烯酸系聚合物的AG偏光板及平面偏光板之 親和性相同的情形，按接觸面積減少的部分，與（甲基） 丙烯酸系聚合物之間的黏著力，則平面偏光板者較AG偏 光板者爲增大。 然而，如對成分（B )的液體離子鹽的丙烯酸系聚合 物之相溶性係適度者（不完全相溶而稍微發生定域化（ localization ))之情形，則液體離子鹽不致於滲出（ b 1 e e d i n g )而在黏著劑表面稍微定域化後爲進行對a G偏 光板的凹凸面之塡孔之故黏著力會增大。 該液體離子鹽與（甲基）丙烯酸系聚合物的相溶性， 係和液體離子鹽的陽離子與陰離子的組合及（甲基）丙烯 酸系聚合物中的具有燒化氧構造之單體的含量有關係。首 先，液體離子鹽的離子結合力，係由於陽離子/陰離子的 組合將依無機/無機、有機/無機、有機/有機的順序增大之 故，本身爲高極性之成分（A)對（甲基）丙烯酸系聚合 物的相溶性，則依有機/有機、有機/無機、無機/無機順序 增高。另一方面，具有烯化氧構造之單體的含量愈多時極 性將愈高，結果對液體離子鹽之相溶性即增高。 於是，如作爲液體離子鹽而選擇有機陽離子與無機陰 離子的組合並將（甲基）丙烯酸系聚合物中具有烯化氧構 造之單體含量作成1 〇至70質量％，則其相溶性不致於過 高之下成爲適度者而獲得對上述凹凸面的塡孔效果，結果 不管AG偏光板、平面偏光板的表面形狀、極性的差異， -23- 200829668 而能獲得具有同樣黏著力之黏著劑組成物。相對於此，在 含有具有烯化氧構造之單體70質量％以上之情形，或作爲 液體離子鹽而採用有機陽離子或有機陰離子的組合之情形 ，由於黏著劑組成物的極性將增高之故，與表面的極性低 的 AG偏光板的密合性惡化，又由於丙嫌酸系聚合物與液 體離子鹽的相溶性高而不會發生離子鹽的定域化之故，對 AG偏光板之黏著力仍然停留在低的程度。 如此，對AC偏光板而言，降低（甲基）丙烯酸系聚 合物之極性之結果，或選擇塡孔效果高的有機陽離子與無 機陰離子之組合之結果黏著力將增大，一方面，對平面偏 光板而言，提高（甲基）丙烯酸系聚合物的極性之結果黏 著力將增大，惟本申請案發明而言，如調整該（甲基）丙 烯酸系聚合物之極性和塡孔效果之兩者之結果，即可製得 對表面狀態相異之偏光板能發揮同等黏著力之黏著劑組成 物。 〔產業上之利用可能性〕 本發明之黏著劑組成物，係帶電防止效果優異之同時 ，在低速、高速剝離之任一情形，均因被黏附體表面的形 狀及極性的差異所引起之黏著力之差小、且因剝離速度所 引起之黏著力的差亦小之故，在機械特性優異，而能提升 作對效率者。 因而，採用本發明之黏著劑組成物之黏著薄片，係適 合作爲偏光板等的光學構件的表面保護用黏著薄片使用者 -24-200829668 IX. EMBODIMENT OF THE INVENTION The present invention relates to an adhesive composition, and more particularly to an adhesive layer for a surface protective sheet of an optical member such as a polarizer, which is excellent in charge prevention At the same time, it is possible to reduce the adhesive composition which is inferior to the adhesive strength due to the shape, polarity or peeling speed of the surface of the adherend. [Prior Art] As a pressure-sensitive adhesive sheet attached to an electronic device or the like, a substrate, a release paper, or the like is subjected to a charging prevention treatment, or a laminated coating layer is used as an undercoat layer of an adhesive. It is charged to prevent adhesion of the sheet. In recent years, there has been an increasing demand for a charging prevention function for the pressure-sensitive adhesive layer itself, which has led to the development of a charging preventing adhesive having a charging inhibitor added to the adhesive layer. For example, there is a report of an adhesive composition containing an ionic liquid and a (meth)acrylic polymer having a (meth)acrylic acid alkane oxide (refer to Patent Document 1). However, an adhesive sheet using the above-described adhesive composition, for example, is attached to a low-polarity and anti-glare (AG) polarizer having a rough surface, and is attached to a highly polar surface. In the case of a smooth plane polarizer, since the difference in adhesion between the surface shape and the polarity is caused, it is necessary to separately use the adhesive sheet designed by the type of the polarizing plate. In this way, in the operation of the electronic device using the AG polarizing plate and the electronic device using the planar polarizing plate in the parallel operation of -5-200829668, it is necessary to utilize the adhesive sheets which are suitable for both, and thus the cost or the operation There is a problem with the efficiency direction. On the other hand, the adhesive sheet which has achieved the function of protecting the surface is finally peeled off and discarded. However, when the peeling operation is performed at a high speed, the force required for peeling due to the adhesive force is increased, and there is Problems such as low work efficiency, pollution, and the like are caused, and if the adhesion is suppressed to improve such problems, the adhesion of the members is poor, so that there is a problem of relief or peeling of the adhesive sheets. In order to solve such a problem, there is a pressure-sensitive adhesive which reduces the rate dependence of peeling force by using an acrylic copolymer having a hydroxyl group and a carboxyl group and having a specific range of glass transition temperatures and an aromatic polyfunctional isocyanate compound. (pressare sensitive adhesive) report of the composition (refer to Patent Document 2). However, the above-mentioned adhesive composition does not have a charging prevention function, and does not reduce the difference in adhesion due to the shape and polarity of the surface of the adherend. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2004-263 084 Patent Document 2: Japanese Patent Laid-Open No. JP-A No. 2001-263 The excellent preventive property can reduce the difference in cohesive force due to the difference in the surface state of the adherend, and -6-200829668 has a small adhesive composition at the time of high-speed peeling and low-speed peeling, so that the adhesive composition is small. An object of the present invention is to provide such an adhesive composition. [Means for Solving the Problems] As a result of intensive research to solve the above problems, the present inventors have found that a (meth)acrylic monomer having an alkylene oxide structure has a specific The (meth)acrylic polymer obtained by copolymerizing two kinds of monomers of a functional group and an alkyl (meth)acrylate, and the adhesion of the liquid ionic salt and the isocyanate crosslinking agent formed by the organic cation and the inorganic anion The composition of the agent is excellent in charging prevention effect, and can reduce the difference in adhesion due to the shape and polarity of the surface of the adherend without being peeled off, and can also reduce the adhesion caused by the peeling speed. The fact of the difference finally completes the present invention. That is, the present invention is an adhesive composition characterized by containing the following components (A) to (C). (A) (meth)acrylic polymer obtained by copolymerization of the following components (al) to (a4) (however, the total of (al) to (a4) is 100% by mass. / (a) 1) 10 to 70% by mass of the (meth)acrylic monomer having an alkylene oxide structure (a2) 1 to 8 mass% of the monomer having a hydroxyl group U3) Any one having a carboxyl group, a guanamine group, or an amine group Monomer 0.05~0.5% by mass 2 5 to 85% by mass (a4) alkyl (meth)acrylate 200829668 (B) Liquid ionic salt (C) isocyanate crosslinker composed of organic cations and inorganic anions Further, the present invention is an adhesive sheet characterized by performing crosslinking of the above-mentioned adhesive composition. [Effects of the Invention] The adhesive composition of the present invention has an excellent charging prevention effect and can reduce the difference in adhesion due to the shape and polarity of the surface of the adherend or the peeling speed, and is applicable. It has a wide range of adherends, excellent mechanical properties and improved work efficiency. BEST MODE FOR CARRYING OUT THE INVENTION The adhesive composition of the present invention contains a (meth)acrylic polymer (component (A) obtained by copolymerizing the components (a1) to (a4) described below as a constituent component. ), a liquid ionic salt (component (B)) composed of an organic cation and an inorganic anion, and an isocyanate crosslinking agent (ingredient (C)). The component constituting the (meth)acrylic polymer is a (meth)acrylic monomer (component (al)) having an oxygen-containing structure, a monomer containing a radical (component (a2)), and a carboxyl group. A monomer of any functional group of amidino or an amine group (ingredient (a3)) and a (meth)acrylic acid ester (ingredient (a4)). The component (a 1 ) constituting the component (A) is a structure having an alkylene oxide structure in the molecule, and the alkylene oxide structure may, for example, be a hydroxymethylene group, a hydroxyethyl group - 200829668, or a hydroxy-properylene group. The number of addition moles of the alkylene oxide structure of (meth)acrylic acid is not limited, but is preferably from 1 to 3. Specific examples of the (meth)acrylic monomer having the above-described vaporized oxygen structure include methoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth)acrylate, and the like. Ethoxypolyethylene glycol (meth) acrylate; ethoxylated polyethylene glycol such as ethoxydiethylene glycol (meth) acrylate or ethoxy triethylene glycol (meth) acrylate ( Methyl) acrylate; butoxy polyethylene glycol (meth) acrylate such as butoxyethylene glycol (meth) acrylate or butoxy triethylene glycol (meth) acrylate; phenoxydiethylene Phenoxypolyethylene glycol (meth) acrylate such as alcohol (meth) acrylate or phenoxy triethylene glycol (meth) acrylate; methoxypolypropylene glycol such as propylene oxide propylene glycol (meth) acrylate (Meth) acrylate, etc. Among them, ethoxydiethylene glycol acrylate, methoxyethyl acrylate and the like are very useful. The (meth)acrylic monomer having the alkylene oxide structure of the above component (al) may be used singly or in combination of two or more kinds thereof, but the (meth)acrylic acid having the entire content of the component (A) The monomer component of the polymer is from 10 to 70% by mass, preferably from 20 to 60% by mass. If the content is less than 10% by mass or more than 70% by mass, the difference in adhesion due to the surface shape and polarity of the adherend may increase, or adhesion to the adherend may occur. Pollution. Further, the hydroxyl group-containing monomer constituting the component (a2) of the component (A) may, for example, be 2-hydroxyethyl (meth) acrylate or 2-hydroxypropyl (meth) acrylate. 6-Hydroxyhexyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polypropylene glycol - (meth) acrylate, 1,6-hexane di-9 - 200829668 alcohol - (meth) acrylic acid a (meth) acrylate of an alkanediol such as an ester; a (meth) propylene such as N-hydroxyethyl (meth) acrylamide or N-hydroxypropyl (meth) acrylamide Amidoxime, in which 4-hydroxybutyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, etc. are used well. The hydroxyl group-containing monomer of the component (a2) may be used singly or in combination of two or more kinds, and it is preferred that the total content of the monomer component of the (meth)acrylic polymer of the component (A) is 1 to 8 mass%, more preferably 3 to 6 mass%. Further, the monomer containing a functional group of a carboxyl group, a mercaptoamine group or an amine group which constitutes the component (a) of the component (A), and a monomer having a hydroxyl group, may be exemplified by (meth) Acrylic acid, (meth)acrylic acid carboxyethyl ester, itaconic acid, crotonic acid, maleic acid, fumaric acid, etc., and a mercapto group-containing monomer, exemplified by: acrylamide, N, N - dimethyl methacrylate, N-( 1,1-monomethyl-3- oxybutyl) propylene amide, tert-butyl propyl decyl sulfonate, etc., further, amine-containing monomer In terms of, N,N-dimethylamine ethyl (meth) acrylate, N,N-diethylamine ethyl (meth) acrylate, N,N-dimethylaminopropyl (A) Acrylate, N,N-diethylaminopropyl (meth) acrylate, and the like. Among them, acrylic acid, acrylamide, and dimethylamine ethyl methacrylate are very useful. Further, the component (a3) may contain two or more monomers having a carboxyl group, a guanamine group or an amine group, such as (N', N'-dimethylaminomethyl) acrylamide. The monomer containing a functional group of a carboxyl group, a guanamine group or an amine group of the above component (a3) may be used singly or in combination of two or more kinds, but the entire content of the component (A) is The monomer component of the acrylic polymer-10-20429668 is preferably 0.05 to 0.5% by mass, more preferably 1 to 0.3% by mass. If it is in this range, the difference in adhesive force due to the peeling speed can be reduced. For example, when the polymer (a3) is 0.05% by mass or less, it is difficult to reduce the speed dependency of the peeling force, and if it is 0.5% by mass or more, In the case of high-speed peeling, the phenomenon of repeated stop and instantaneous peeling (zipping) occurs. Further, the (a3) monomer also has an effect of finely adjusting the polarity of the (meth)acrylic polymer. Further, the (meth)acrylic acid alkyl ester constituting the component (a4) of the component (A) may specifically be methyl (meth)acrylate, ethyl (meth)acrylate or (methyl). N-propyl acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, n-amyl (meth)acrylate, isoamyl (meth)acrylate, (N-hexyl methacrylate), 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, etc., among which 2-ethylhexyl (meth) acrylate is preferred. The (meth)acrylic acid alkyl ester of the component (a4) may be used singly or in combination of two or more kinds, and the total content of the monomer component of the (meth)acrylic polymer is preferably 25 to 85 mass%, more preferably 3 5 to 75 mass%. The (meth)acrylic polymer of the component (A) used in the present invention is a monomer of the above components (a 1 ) to (a4), for example, solution polymerization 'emulsification polymerization, bulk polymerization, etc. The method of synthesizing a (meth)acrylic polymer can be obtained by copolymerizing it. The molecular weight of the (meth)acrylic polymer of the component (A) is not particularly limited, but it is preferably from 200,000 to 700,000 to -11 - 200829668. Further, in the production of the (meth)acrylic polymer of the component (A) used in the present invention, in addition to the above components, a polymerization initiator or a polymerization regulator may be used as needed. The polymerization initiator may be exemplified by a peroxide-based polymerization initiator such as an azo-based polymerization initiator such as azo-isobutyronitrile or a peroxide such as benzamidine peroxide. The mixture of the monomers of the above components (al) to (a4) is used in an amount of from 0.01 to 1 part by weight, based on 100 parts by weight. On the other hand, the component (B) of the present invention is a liquid ionic salt composed of a combination of an organic cation and an inorganic anion. Herein, the liquid ionic salt means a salt of a liquid at room temperature (25t). The organic cation constituting the above component (B) may, for example, be an imidazolium cation, a pyridinium cation, a piperidinium cation, or a pyrrolidinium cation. a tetrahydropyrrolidine cation, a dihydropyrimidine cation, a tetraalkylammonium cation, a trialkyl phosphonium cation, or the like. Here, 'immediately, an imidazole cation, a pyridyl cation, and particularly preferably a pyridinium cation. Specific examples of the above-mentioned imidazolium cation include 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, 1-ethyl-3-methylimidazolium cation, and 1 - butyl-3-methylimidazolium iron cation, 1-hexyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-mercapto-3-methylimidazolium cation, 1-dodecyl-3-methylimidazolium cation, 1-tetradecyl-3-methylimidazolium cation, 1,2-dimethyl-3-propyl-12- 200829668 miso cation , I-ethyl-2,3 - _^methyl miso iron cation, 1-butyr-2,3-dimethylimidazolium cation, 1·hexyl-2,3-dimethylimidazole cation, etc. '中中' is preferably 1-butyl-3-methyl-wow iron cation, 1-hexyl-3-methylimidazolium cation. Further, specific examples of the pyridyl cation described above include 1-ethylpyridine cation, 1-butylpyridyl cation, 1-hexylpyridine cation, and 1-butyl-3-methylpyridine Cation, 1-butyl-4-methylpyridinium cation, 1-hexyl-3-methylpyridinium cation, 1-hexyl-4-methylpyridyl cation, butylbutyl-3,4-dimethylpyridine cation Etc., among them, 1-hexyl-4-methylpyridine iron cation is very useful. Further, the inorganic anion constituting the component (B) may, for example, be Cf, Br_, Γ, A1C14·, AI2CI7-, BF4., PF6., C104_, NO 3 , A s F 6 , S b F 6 Λ N b F 6 , T aF 6 , F (HF) n , etc., in which pf6_, BF4_, etc. are very useful. The component (B) of the present invention is a salt which is suitably selected from the combination of the above organic cation and inorganic anion, and specifically, iota-ethyl-3-methylimidazolium tetrafluoroborate or ethylidene is exemplified. -3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylpyridinium tetrafluoroborate, 1·butyl-3-methylpyridine gun hexafluorophosphate, 1-hexyl- 3-methylimidazolium tetrafluoroborate, 1-hexyl-3-methylimidazolium hexafluorophosphate, octyl-3-methylimidazolium iron tetrafluoroborate, 1-octyl-3- Methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidium bromide, 1-hexyl-3-methylimidazolium chloride, 1-hexyl-2,3-dimethylimidazole Fluoroborate, 1-hexyl-2,3-dimethylimidazolium hexafluorophosphate; 1-butylpyridinium iron tetrafluoroborate, 1 ·butylpyridinium iron-6-13-200829668 fluorophosphate, 1-hexyl pyridyltetrafluoroborate, 1-hexylpyridine hexafluorophosphate, 1-butyl-3-methylpyridyltetrafluoroborate, 1-butyl-3-methylpyridine Fluorophosphate, hexylmethylpyridinium tetrafluoroborate, 1-hexyl-4-methylpyridine Hexafluorophosphate, etc., wherein 1-butyl-3-methylimidazolium hexafluorophosphate, hexyl-3-methylimidazolium tetrafluoroborate, 1-hexyl-4-methylpyridinium Hexafluorophosphate is very useful. The compounding amount of the component (Β) is usually in the range of 〇. 5 to 3 parts by weight, preferably in the range of 〇·3 to 1.25 parts by weight, based on 100 parts by weight of the above component (A). Further, the isocyanate crosslinking agent of the component (C) of the present invention is a compound having an isocyanate group capable of crosslinking with a hydroxyl group in a molecule, and specifically, a methylphenyl diisocyanate or a chlorobenzene derivative can be exemplified. Isocyanate monomer such as diisocyanate, hexamethylene diisocyanate, tetramethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate, hydrogenated xylene diisocyanate, or the like An isocyanate compound and an iso-trimeric isocyanate compound which are subjected to an addition reaction to an alcohol compound having two or more members such as trimethylolpropane. Further, a polyamine ester which is subjected to an addition reaction of an isocyanate compound, such as a polyether polyol or a polyester polyol, an acrylic polyol, a polybutene polyol, or a polypentadiene polyol, which are well-known, may also be mentioned. Prepolymer and the like. Among them, hexamethylene diisocyanate is very useful. The amount of the component (C) to be formulated is usually in the range of 0.5 to 10 parts by weight, preferably 2 to 5 parts by weight, per 100 parts by weight of the component (a). -14- 200829668 The adhesive composition of the present invention is obtained by adding other additives to the above components (A) to (C) as needed, and mixing them according to a usual method. Further, in this case, a solvent such as an organic solvent may be contained in order to dissolve or disperse the above components, but it is preferred to directly mix them without using a solvent. In the charge-preventing adhesive composition of the present invention, in addition to the above-described respective components, an adhesive-imparting agent, a plasticizer, an oxidation preventive agent, a preservative, and the like may be added as needed within a range that does not impair the effects of the present invention. The adhesive composition of the present invention obtained as described above is applied to the surface of the support by a usual method and dried to obtain the adhesive sheet of the present invention. In the production of the adhesive sheet, for example, a resin sheet such as polyester or polyethylene can be used as the support, and the thickness of the adhesive composition is usually 2 to 30/m, preferably 10 Up to 20//m. The adhesive sheet of the present invention obtained as described above has a small difference in adhesion force when attached to a surface shape such as an AG polarizing plate or a planar polarizing plate and a very different adherend, regardless of the peeling speed, and The difference between the adhesive force at the time of low-speed peeling and the adhesive force at the time of high-speed peeling is also small. [Embodiment] Next, the present invention will be described in more detail by way of Production Examples and Examples, but the present invention is It is not limited by the embodiment and the like. [Production Example 1] -15- 200829668 60 parts by weight of ethoxydicarboxylate (ECA, manufactured by Kyoeisha Co., Ltd.) as a component (al) was placed in the reaction container as a component (a2) hydroxybutyl acrylate. (4HBA) 5 parts by weight, as component (a3) ruthenium octoate 15 parts by weight, as a component (a4), 2_ethylhexyl propyl ester (2EHA) 34.85 parts by weight, ethyl acetate 12 parts by weight, and diiso) Nitrile (AIBN) 0.1 part by weight, and the air in the reaction was replaced with nitrogen. Then, the reaction was heated to 70 C and reacted for 6 hours while stirring under a nitrogen atmosphere. After completion of the reaction, it was diluted with ethyl acetate to obtain an acrylic polymer solution a i having a molecular weight of 50,000. [Production Examples 2 to 3] Acrylic polymer solvent and A 3 were obtained in the same manner as in Production Example 1, except that the components (a 1 ) to (a4) were changed to the following Table 2. The molecular weights thereof are also summarized in Table 1. [Production Comparative Examples 1 to 15] The acrylic polymer was dissolved and B 1 5 was obtained in the same manner as in Production Example 1 except that the components (a 1 ) to (a4) were changed to the following Table 2. The molecular ® is also listed in Table 1. Acrylic 4 _ acrylic azo container container, A2 thereof, B 1 -16- 200829668 [Table 1] al a2 a3 a4 曰 yj J in MEA ECA 4HBA 2HEA AA AM DM 2EHA Manufacturing Example 1 A1 - 60 5 • 0.15 • • 34.85 500,000 manufacturing example 2 A2 10 10 3 • 0.3 - 0.1 76.6 400,000 manufacturing example 3 A3 10 10 - 8 • 0.4 surface 71.6 400,000 manufacturing comparison example 1 B1 • 5 5 surface 0.15 - drying 89.85 400,000 Manufacturing Comparative Example 2 B2 10 25 5 - 0.15 Hua 59.85 400,000 Manufacturing Comparative Example 3 B3 15 70 5 A 0.15 Strike a 9.85 500 000 Manufacturing Comparative Example 4 B4 A 5 5 0.15 A 89.85 400 000 Manufacturing Comparative Example 5 B5 15 70 5 • 0.15 reading 9.85 500,000 manufacturing comparison example 6 B6 5 5 • 0.15 a 89.85 400,000 manufacturing comparison example 7 B7 10 25 5 • 0.15 • a 59.85 400,000 manufacturing comparison example 8 B8 15 70 5 0.15 9.85 500,000 manufacturing comparison example 9 B9 - 5 5 - 0.15 89.85 400,000 manufacturing comparative example 10 B10 10 25 5 - 0.15 stupid 59.85 400,000 manufacturing comparative example 11 B11 15 70 5 0.15 9.85 500,000 manufacturing comparative example 12 B12 10 25 5 - 60,400,000 manufacturing comparative example 13 B13 15 35 5 1 Strike • 44.45 million Comparative Example 14 B14 50 Normal • • 0.15 a 49.85 450 000 Comparative Production Example 15 B15 - 26 - 4 - - 70 45 million over this Table the abbreviations represent the following meanings. MEA: methoxyethyl acrylate EC A : ethoxydiethylene glycol acrylate 4HBA : 4-hydroxybutyl acrylate 2HEA : 2-hydroxyethyl acrylate AA : acrylic acid A Μ : acrylamide DM: dimethyl Amine ethyl methacrylate 2EHA: 2-ethylhexyl acrylate-17-200829668 [Example 1] 100 parts by weight of the solid component of the acrylic polymer solution A obtained in Production Example 1 was added as a liquid 1 part by weight of hexyl-4-methylpyridyl D-hexafluorophosphate of ionic salt, and 3 parts by weight of hexamethylene diisocyanate (HMDI) as an isocyanate crosslinking agent, which are mixed to obtain an adhesive Agent composition. The adhesive composition was applied to the polyester film in a manner that the thickness after drying was 20 #m, and after drying at 80 ° C for 2 minutes, the peeled-treated polyester was attached to the adhesive layer side. A film (PET 3 8 1 1, manufactured by Lenkoy Co., Ltd., 1^1^1〇) was aged at 7:1 and a humidity of 65% to obtain an adhesive sheet. [Examples 2 to 3] Adhesive compositions and adhesive sheets were prepared in the same manner as in Example 1 except that the acrylic polymer solution and the liquid ion salt were changed to the following Table 2. Here, Table 2 describes the case where the cation and the anion of the liquid ionic salt are organic or inorganic. [Comparative Examples 1 to 15] Adhesive compositions and adhesive sheets were obtained in the same manner as in Example 1 except that the acrylic polymer solution and the ionic liquid were changed to the following Table 2. Here, the cation and anion of the ionic salt are in the state of organic or inorganic, and the ionic salt is at room temperature. -18- 200829668 [Table 2] Cationic ion salt cationic anion state Example 1 ---Α1 1-hexyl-4·methylpyridine hexafluorophosphate organic inorganic liquid Example 2 1-butyl-3· Methylimidazolium hexafluorodislate organic inorganic liquid Example 3 1-Hexyl-3-methylimidazolium tetrafluoroborate organic inorganic liquid Comparative Example 1 __B1 - _ Comparative Example 2 -___B2 A coffee comparison example 3 __B3 一一•Comparative Example 4 __B4 1·Hexyl-4-methylpyridine hexafluorodislate organic inorganic liquid Comparative Example 5 __B5 1-butyl-3-methylimidazolium hexafluorophosphate organic inorganic liquid comparative example _ __B6 Trimethylpropyl bis(trifluoromethanesulfonyl) quinone imine organic organic liquid Comparative Example 7 B7 Trimethylpropylammonium bis(trifluoromethanesulfonylaseimine organic organic liquid Comparative Example 8 ^_B8 1-Hexyl-3·methylimidazolium hexafluoromethanesulfonate organic organic liquid Comparative Example 9 B9 lithium perchlorate ^fnr stern inorganic inorganic solid Comparative Example 10 BIO lithium perchlorate inorganic inorganic solid Comparative Example 11 Bll Lithium perchlorate inorganic inorganic solid Comparative Example 12 B12 1-Hexyl-4- Pyridine hexafluorophosphate organic inorganic liquid Comparative Example 13 B13 1-butyl-3-methylimidazolium hexafluorophosphate organic inorganic liquid Comparative Example 14 B14 1-butyl-3-methylimipid iron hexafluoro Disc ester organic-inorganic liquid Comparative Example 15 B15 1-Hexyl-3-methylimidazolium hexafluoromethanesulfonate organic organic liquid The adhesive sheets obtained in Examples 1 to 3 and Comparative Examples 1 to 5 were evaluated according to the following evaluations. The method and the standard were used to evaluate the peeling force and the charge prevention property. The results are shown in Table 3. (Evaluation method and standard) <Peeling force> After the adhesive sheet was cut into a size of 150 mm x 250 mm, the peeling treatment was performed. The polyester film is peeled off and transcribed to one side of the AG polarizing plate or the plane (planar) polarizing plate, and placed at 23 ° C, humidity -19-200829668 65%, and then measured for attachment. Adhesive strength of the adhesive sheet at a tearing speed of 300 mm/min (low speed) and 30 m/min (high speed) in the 180° direction, and as a low-speed peeling force, high-speed peeling force <charge prevention property> (evaluation method) ) making the acrylic (70mm xl50mmxlmm) and a polarizing plate (AG polarizing plate, planar polarizing plate) are laminated so that the AG surface of the polarizing plate and the flat surface can be the outer side, and a static eliminator (SJ-F3 00, manufactured by KEYENCE) is used. Force to remove static electricity. The adhesive sheets prepared in the above Examples and Comparative Examples were cut into 40 mm x 150 mm, and then pressed against a AG face and a flat surface of a pre-static-removed laminate using a 2 kg rubber roller. After being placed for one day at 25 t and a humidity of 65%, the static electricity was removed again, and the surface potential of the polarizing plate at a tearing speed of 30 m/min and a peeling angle of 180° was measured using a potentiometer (SK, manufactured by Keyence). . (Evaluation Criteria) Evaluation of peeling tape voltage 〇: ±0.5kV or less ±0.5 〜1.OkV X ·· ±1 .OkV or more -20· 200829668 [Table 3] High-speed peeling force (3 〇m/min) Unit: g / 1 5 0 mm High-speed peeling force (3〇m/min) Unit: g /1 5 0 mm Charge prevention AG1 Plane 2 1-2 AG3 Plane 4 3,4 Example 1 42 42 0 650 650 0 〇Example 2 42 42 0 650 650 0 〇 Example 3 43 43 0 650 650 0 〇 Comparative Example 1 42 36 6 650 600 50 X Comparative Example 2 36 43 7 600 650 50 X Comparative Example 3 32 48 16 550 750 200 X Comparative Example 4 Contamination pollution not determined Comparative Example 5 36 47 11 600 750 150 〇Comparative Example 6 41 36 7 650 600 50 〇Comparative Example 7 36 42 6 600 650 50 〇Comparative Example 8 32 48 16 550 750 200 〇Comparative Example 9 Pollution contamination Judgment Comparative Example 10 Pollution Contamination Not Determined Comparative Example 11 33 47 14 550 750 200 Δ Comparative Example 12 54 48 6 900 750 50 〇 Comparative Example 13 53 52 1 SOOzip^1 500zip^ 0 X Comparative Example 14 Cannot be measured X2 Cannot be measured ^ Undetermined Comparative Example 15 53 47 6 900 750 150 〇*1 : Cannot follow due to deformation of the adhesive layer Off velocity, so that the instantaneous release appears to stop rotation of the phenomenon repeated. *2: When peeling, the adhesive layer was damaged, so that it could not be accurately measured. As a result, it is understood that the adhesive tape (tape) produced by using the adhesive composition of the present invention is excellent in charge prevention property, and is applied to both the high-speed peeling and the low-speed peeling, and is applied to the AG polarizing plate and the planar polarizing plate. -21 - 200829668 shows the same adhesion. In addition, the difference between the adhesion at high speed peeling and the low speed peeling is also small. On the other hand, in the comparative example in which the monomer composition or the ionic salt of the acrylic polymer is different from that of the present inventors, the difference in adhesion between the 贞[]AG polarizing plate and the planar polarizing plate is large, or occurs in a pair. Contamination of the adherend so that sufficient performance cannot be achieved. For example, the acrylic polymer obtained by the same monomer composition as that of the acrylic polymer used in Example 1 of the above-mentioned Patent Document 1 (Japanese Laid-Open Patent Publication No. 2006-63 31 1) is the same as the organic cation used. Comparative Example 1 of the liquid ion salt formed by the organic anion and the high-speed peeling at both the low-speed peeling and the high-speed peeling are large, and the adhesion between the AG polarizing plate and the flat polarizing plate is large, and the adhesive force and the high-speed peeling at the time of low-speed peeling. The difference in adhesion is also greater than in Examples 1 to 3. [Operation] The reason why the adhesive sheet of the present invention can exhibit the same adhesive force in the AG polarizing plate or the flat polarizing plate is not clear, but it can be presumed as follows. That is, the AG polarizing plate is low in polarity and has unevenness on the surface, and the flat polarizing plate is relatively smooth and highly polarized. The more the content of the functional group-containing monomer having a (meth)acrylic monomer or other hydroxyl group-containing monomer having an alkylene oxide structure, the higher the polarity of the (meth)acrylic polymer of the component (A) However, the higher the polarity of the (meth)acrylic polymer, the lower the adhesion to the low-polarity AG polarizer and the greater the adhesion to the highly polar planar polarizer. On the other hand, since the gap between the unevenness of the surface of the AG polarizing plate is small, -22-200829668 'normally, the adhesive is not completely adhered, and the concave portion is not in contact. Therefore, when the affinity between the AG polarizing plate and the planar polarizing plate of the (meth)acrylic polymer is the same, the adhesion between the portion having a reduced contact area and the (meth)acrylic polymer is flat. The polarizer is larger than the AG polarizer. However, if the compatibility of the acrylic polymer of the liquid ionic salt of the component (B) is moderate (incompletely miscible and slightly localized), the liquid ionic salt does not bleed out (b 1 eeding), after the surface of the adhesive is slightly localized, the adhesion is increased for the pupil of the concave-convex surface of the a-G polarizing plate. The compatibility of the liquid ionic salt with the (meth)acrylic polymer, the combination of the cation and the anion of the liquid ionic salt, and the content of the monomer having the sintered oxygen structure in the (meth)acrylic polymer are relationship. First, the ionic binding force of the liquid ionic salt is due to the combination of cation/anion in the order of inorganic/inorganic, organic/inorganic, organic/organic, and is itself a highly polar component (A) pair (methyl The compatibility of the acrylic polymer is increased in the order of organic/organic, organic/inorganic, inorganic/inorganic. On the other hand, the higher the content of the monomer having an alkylene oxide structure, the higher the polarity, and the compatibility with the liquid ion salt is increased. Therefore, if the combination of the organic cation and the inorganic anion is selected as the liquid ionic salt and the monomer content of the (meth)acrylic polymer having the alkylene oxide structure is from 1 〇 to 70% by mass, the compatibility is not improved. When it is too high, it becomes a moderate person and obtains a puncture effect on the above-mentioned uneven surface. As a result, regardless of the difference in surface shape and polarity of the AG polarizing plate and the planar polarizing plate, -23-200829668 can obtain an adhesive composition having the same adhesive force. Things. On the other hand, in the case where 70% by mass or more of the monomer having an alkylene oxide structure is contained, or a combination of an organic cation or an organic anion is used as the liquid ionic salt, since the polarity of the adhesive composition is increased, The adhesion to the AG polarizer having a low polarity on the surface is deteriorated, and since the compatibility between the acrylic acid polymer and the liquid ion salt is high, the localization of the ion salt does not occur, and the adhesion to the AG polarizer is adhered. The force is still at a low level. Thus, for the AC polarizing plate, as a result of lowering the polarity of the (meth)acrylic polymer, or selecting a combination of an organic cation having a high boring effect and an inorganic anion, the adhesion is increased. In the case of a polarizing plate, as a result of increasing the polarity of the (meth)acrylic polymer, the adhesion will increase, but in the invention of the present application, for example, the polarity and the pupillizing effect of the (meth)acrylic polymer are adjusted. As a result of both, an adhesive composition capable of exerting the same adhesion to a polarizing plate having a different surface state can be obtained. [Industrial Applicability] The adhesive composition of the present invention is excellent in the charging prevention effect, and is adhered to the surface of the adherend by the difference in shape and polarity at any of the low speed and high speed peeling. The difference in force is small, and the difference in adhesion due to the peeling speed is also small, and the mechanical properties are excellent, and the efficiency of the pair can be improved. Therefore, the adhesive sheet using the adhesive composition of the present invention is suitable for the surface protective adhesive sheet of an optical member such as a polarizing plate.